Index: shinken-mod-webui/module/plugins/eltdetail/views/eltdetail.tpl
===================================================================
--- shinken-mod-webui.orig/module/plugins/eltdetail/views/eltdetail.tpl
+++ shinken-mod-webui/module/plugins/eltdetail/views/eltdetail.tpl
@@ -464,7 +464,7 @@ Invalid element name
 						</tr>
 						<tr>
 							<td class="column1"><b>Notification interval</b></td>
-							<td class="column2">{{elt.notification_interval}} mn (period : {{elt.notification_period.timeperiod_name}})</td>
+							<td class="column2">{{elt.notification_interval}} mn (period : {{elt.notification_period.timeperiod_name if elt.notification_period else "None"}})</td>
 						</tr>
 						<tr>
 							<td class="column1"><b>Current Attempt</b></td>
